Adjustable taper-boring device.



J. SANDERSON. ADJUSTABLE TAPER BORING DEVICE.

APPLICATION FILED NOV. 11, 1911.

Patented Dec. 10, 1912.

2 SHEETS-SHEET 1.

muw/toz J Jayd e rs? CVOLUMBIA PLANOGRAPE-l c0.,WAsHlNar0N. D. c.

W. J. SANDERSON.

ADJUSTABLE PAPER BORING DEVICE.

APPLICATION FILED 11017.11, 1911. 1,046,496. Patented Dec. 10, 1912.

- 2 SHEETS-SHEET 2.

pea

wi/lmmoeo allow:

Suva wot COLUMBIA PLANOGRAPH co., wAsmNG'loN. n.

14 575627 J. 50. yders a STATES PATENT orrron.

T0 AUGUST L. H. HINRICI-ISEN BIRMINGHAM, ALABAMA.

AND ONE-THIRD 10 CHARLES W. HADCOCK, 0F

ADJUSTABLE 'IAPER-BORING DEVICE.

Specification of Letters Patent.

Patented Dec. 10, 1912.

Application filed November 11, 1911. Serial No. 659,798.

To all whom it may concern:

Be it known that I, WILLIAM J. SANDER- SON, a citizen of the UnitedStates, residing at Birmingham, in the county of Jefferson and State ofAlabama, have invented certain new and useful Improvements in AdjustableTaper-Boring Devices, of which the following is a specification.

The present invention relates to a boring device adapted to be employedin forming cylindrical openings or for cutting tapered bores ofdifferent shapes.

An important object of my invention is to provide means of the abovementioned character which may be readily adjusted for cutting difierentshapes of tapered bores.

A further object of this invention is to provide an adjustable taperboring device having novel means to effect the longitudinal travel ofthe tool or cutter.

A further object of the invention is to provide a device of the abovementioned character, which is simple in construction, cheap'tomanufacture, and easy to operate.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame, Figure 1 is a side elevation of the device, showing it applied toparts of a drill press, Fig. 2 is an edge view of the same, Fig. 3 is anenlarged longitudinal sectional view, taken through the movable carriageand relatively stationary track, associated elements being shown inelevation, Fig. 4 is a horizontal sectional view taken on line 4 -4 ofFig. 1, Fig. 5 is a similar view taken on line 55 of Fig. 1, Fig. 6 is asimilar view taken on line 6-6 of Fig. 1, and, Fig. 7 is a similar viewtaken on line 7-7 of Fig. 1.

In the drawings wherein is illustrated a preferred embodiment of myinvention, the numeral 1 designates the upper frame of a drill press,upon which is mounted a bearing 2, for receiving a rotatable shaft 3.This shaft is provided at its lower end with a socket 4:, preferablysquare in cross-section, for receiving the upper end of a spindle 5. Thelower end of this spindle is journaled in a fixed bearing 6. Although Ihave shown my device as applied to a drill press,

'7 and carriage 7 I do not wish to restrict myself to such practicealone, as the same can be advantageously used in connection with alathe, boring mill, radial drill, or any machine or appliance having arevolving element.

The numeral 7 (see Figs. 1 and 8) designates a relatively stationarytrack, which is substantially trapezoidal in horizontal crosssection, asshown. This track is provided upon one side thereof with curved arms orsegments 8, rigidly connected therewith and disposed upon opposite sidesof the spindle or rotatable element 5, as more clearly shown in Fig. 6.These curved arms 8 are provided with longitudinal slots 9, forreceiving a bolt 10 carried by the spindle 5. This bolt carries a nut11, for rigidly clamping the arms 8 to the spindle 5 in adjustment atdifferent positions with relation to said spindle. One of the arms 8 isprovided upon its outer surface with a scale 12, cooperating with apointer 13, which is fixedly secured to the spindle 5.

Pivotally mounted upon the spindle 5 below the track 7 is asubstantially U-shaped tool-holder guide or rest 14, more clearly shownin Figs. 1 and 7. This tool-holder guide is pivotally connected with thespindle 5 by a bolt 15, as shown. The guide 14: is provided through itsupper portions with curved slots 16, for receiving the ends of aclamping bolt 17, carried by the spindle 5, as shown. The guide 1% isprovided with a longitudinal slot or recess 18 for receiving the lowerportion of a longitudinally movable tool-holder 19. This tool-holder 19is provided at its lower end with a transverse opening for receiving atool or cutter 20, held in place by a clamping bolt 21, as shown. Theintermediate portion of the tool-holder 19 slidably engages the lowerportion of the track 7 and the upper portion of said toolholder isoff-set, as shown. The upper olfset portion of the tool-holder 19 isrigidly connected with a carriage 7 by clamps 22, held in place by bolts23 engaging the carriage, as shown.

The carriage 7 is approximately U-shaped in horizontal cross-section,affording an opening 24, for receiving a feed screw 25 and the track 7.Interposed between the track is a gib or strip 7 held in place byadjusting screws 7 The lower end of this feed screw operates within ascrewthreaded opening 26 formed through the upper end of the track 7.Disposed below the screwthreaded opening 26 is a counter-bore 27 formedthrough the track 7, as shown. The upper end of the feed screw 25 isprovided with a smooth extension 28, rotatably mounted in an opening 29formed through the upper portion of the carriage 7. The feed screw 25 isprovided below and adjacent the extension 28 with an annular flange 30,as shown. The extension 28 continues in a reduced portion 31, upon whichis mounted a feed drive or star wheel 32. This feed drive cannot turn onthe portion 31 and when rotated will effect a rotation of the feedscrew. Clamping nuts 33 are preferably carried by .the reduced portion31 above and below the feed drive 32. The feed drive comprises arms 34.Connected with the frame 1 is a fixed teed drive arm 35, the lower endportion of which is disposed in the path of travel of the arm 34 of thefeed drive. The arm 35 is preferably provided witha longitudinal slot 36for receiving clamping bolts 37 carried by the frame 1.

The operation of the device is as follows :VVhen the tool-holder 19 isin the vertical position, as shown in Fig. 1, the device may be employedto cut cylindrical bores. When it is desired to cut tapered bores, thenut 11 is unscrewed to permit of angular adjustment of the track 7 withrespect to the spindle 5, the extent of the angle of inclination of thetrack being indicated by the pointer 13 on the scale 12. The track 7 isnow locked to the spindle by screwing up the nut 11. The guide 14 haspreviously been unclamped from the spindle 5 by proper manipulation ofthe clamping bolt 17, whereby said guide will be free to swing to occupyan angular position corresponding to that of the tool-holder 19. Theguide 14 is now locked to the spindle 5 by proper manipulation of theclamping bolt 17 The feed drive arm 35 has its lower portion disposed inthe path of travel of the arms 34 of the feed drive and when the track 7is angularly adjusted, as above described, a suitable feed drive arm 35is provided so that its lower portion will be disposed in the path oftravel of said arms 34, as indicated in dotted lines in Fig. 1. As thespindle 5 revolves it carries all the elements of the device withit andthe tool or cutter 20 will accordingly out the desired bore. When thearms 34 engage the stationary arm 35 a step by step turning movement isimparted to the feed screw 25, causing the carriage 7 to travellongitudinally and also the tool holder 19.

I wish it understood that the form of my invention herewith shown anddescribed 'is to be taken as a preferred example of the same and thatcertain changes in the shape, size, and arrangement of parts mayberesorted to without departing from the spirit of the invention asindicated by the scope of the subjoined claims.

Having thus described my invention, I claim 1. The combination with arotatable element, of a track, a segment connected there with andprovided with a scale, clamping means carried by the rotatable elementto engage said segment, a pointer carried by the rotatable element tocooperate with said scale, a carriage movably mounted onthe track, atool holder connected with the carriage, a tool holder guide angularlyadjustably connected with the rotatable element to engage the lowerportion of the tool holder, and means 'to move the carriagelongitudinally during the rotation of said rotatable element.

2. The combination with a. rotatable element, of a track adapted to bedisposed at diflierent angular positions with relation to said rotatableelement, an arm connected with said track and provided with a curvedlongitudinal slot, a clamping element carried by said rotatableelementand disposed in the Y longitudinal slot, a tool holder, a carriagelongitudinally movably mounted on the track and connected with the toolholder, and means to eflect the longitudinal travel of said carriageincluding a feed screw and star-wheel.

3. The combination with a rotatable element, of a track adapted to bedisposed at different angular positions with relation to the rotatableelement, suitable connecting means between the track and rotatableelement whereby the former may be so angularly adjusted, a carriagelongitudinally movably mounted upon the track, a feed screw extendinglongitudinally of the track and carriage to effect the travel of saidcarriage, a starswheel mounted upon the free end portion of the feedscrew and adapted to be bodily moved with such feed screw when thecarriage and track are moved to a desired angular position, and anelement disposed in the path of travel of the starwheel. 7

4. The combination with a rotatable element, of a track adapted to bedisposed at different angular positions with relation to the rotatableelement, adjustable means connecting said track and rotatable element, acarriage movably mounted on the track, means to move the carriage, atool-holder connected with the carriage, and an angu larly adjustableguide element connected with the rotatable element and engaging the toolholder.

5. The combination with a rotatable element, of a track, a segmentprovided with a scale and connected therewith, a clamping device carriedby the rotatable element and engaging the segment, a carriage mounted onthe track, means to move the carriage and is prevented from having anypercepti- 15 longitudinally, and a tool-holder connected blelongitudinal movement with relation with the carriage. thereto, saidfeed screw having its lower 6. The combination with a rotatable eleenddisposed within the screw-threaded ment, of a track adapted to be bodilymoved axial opening of the track, a star-wheel conwith relation to therotatable element for nected with the upper portion of the feed 20assuming difierent angular positions with screw, and an element disposedin the path relation thereto, suitable connecting means of travel of thestar-wheel.

between the track and rotatable element, In testimony whereof I afliX mysignature said track being provided with a screwin presence of twowitnesses.

threaded axial opening, a carriage mounted WILLIAM J HON SANDERSON. uponthe track to travel longitudinally Witnesses:

thereof, a feed screw connected with the car- R. W. VAUGHAN,

riage so that said feed screw is free to turn GEO. S. LEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

